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Mitsubishi S6R diesel engine air cooler water pump, thermostat, water pipe disassembly, maintenance


Detailed Description:

Mitsubishi S6R diesel engine air cooler water pump, thermostat, water pipe disassembly, maintenance

Mitsubishi S6R diesel engine air cooler water pump, thermostat, water pipe disassembly, maintenance

Disassembly sequence

1 pipe joint

2 cooling water pipe

3 cooling water pipe

4 Rubber hose

5 Cooling water pipe

6 Air cooler water pump

7 Cooling water pipe

8 thermostat

9 seats

2.2 Mitsubishi S6R diesel engine thermostat dismantling and testing

Disassembly of Mitsubishi S6R diesel engine thermostat, testing

Disintegration order

1 thermostat end cap

2 snap ring

3 thermostat

4 Thermostat seal

5 Thermostat housing

Disassembly of Mitsubishi S6R diesel engine thermostat, testing

Disintegration order

1 thermostat end cap 2 thermostat 3 thermostat housing

Dismantling of Mitsubishi S6R diesel engine thermostat, testing MTK, MPTA, MPTK specifications

Disintegration order

1 thermostat end cap 2 thermostat 3 thermostat seal

2.3 Dismantling and Overhauling of Mitsubishi S6R Diesel Engine Cylinder Liner Cooling Water and Air Cooler Thermostat

2.3.1 Checking the seal of the thermostat

(1) Check the seal of the thermostat, and replace it with a new one when found aging or cracking.

(2) The assembly direction of the seal is shown in the figure.

2.3.2 Operation check of Mitsubishi S6R diesel engine cylinder liner cooling water and air cooler thermostat

(1) Place the thermostat in a container filled with water.

(2) Measure the water temperature with a thermometer while heating the water. Measure the temperature when the valve starts to open and the valve rises to the standard value. When the temperature differs greatly from the standard value, replace it with a new one.

Note: (a) Stir with a stick to keep the water temperature in the container uniform. (b) When installing the thermostat, you must first confirm the valve opening temperature marking on the side of the thermostat valve.

part number

Test items

standard value

Note

For Mitsubishi S6R diesel engine cylinder liner cooling water

37546-21700

Valve opening temperature

69 ~ 73ºC

Opening temperature marking 71ºC

Valve raises temperature above 9 mm

85ºC

For air cooler

35C46-05200

Valve opening temperature

33 ~ 37ºC

Opening temperature marking 35ºC

Valve raises temperature by more than 10 mm

50ºC

37546-40700

Valve opening temperature

69 ~ 73ºC

Opening temperature marking 71ºC

Valve raises temperature above 11 mm

85ºC

2.4 Mitsubishi S6R diesel engine heat exchanger dismantling, maintenance

MTK􀇃MPTA􀇃MPTK Specifications

Dismantling and overhaul of Mitsubishi S6R diesel engine heat exchanger

Disintegration order

1 end cap

2 Gasket

3 end cap

4 O-ring

5 filter

6 Gasket

7 zinc rod

8 Zinc

9 expansion tank

2.4.1 Cleaning of Mitsubishi S6R Diesel Engine Heat Exchanger Core

(1) Rinse the outside of the tube with clean water and scrub with a wire brush, etc., and check for corrosion or cracks.

(2) Insert the stick into the tube to remove the sticking matter.

2.5 Disassembly and overhaul of water pump

Dismantling and Overhaul of Mitsubishi S6R Diesel Engine Water Pump

Disintegration order

1 snap ring

2 end cap

3 O-ring

4 Impeller

5 Nut

6 Water pump pulley

7 Spacer, O-ring

8 oil seal

9 snap ring

10 bearing bush

11 Pump shaft

12 Combined seal

13 bearing bush

14 Oil seal

15 pump body (approx. 15 kg)

2.5.1 Inspection of Mitsubishi S6R diesel engine water pump in installation state

Visually inspect the drain in the lower center of the pump body. If water leaks, the combined seal is bad. If there is oil leakage, the oil seal is bad.

2.5.2 Removing the impeller

(1) Remove the retaining ring holding the pump cover with a water pump remover and remove the pump cover.

(2) Use the impeller remover to remove the impeller.

2.5.3 Removing the pump shaft

Remove the retaining ring of the bearing bush on the pulley side, and tap lightly with a press or soft metal hammer to take out the pump shaft and bearing bush together.

2.6 Testing Mitsubishi S6R diesel engine water pump

Measure the bearing pad assembly position of the pump body and shaft, the outer diameter and inner diameter of the bearing pad. If it is not within the standard value range, replace it with a new one.

2.7 Testing Mitsubishi S6R diesel engine water pump shaft

When removing the flange and impeller from the pump shaft, there will be insufficient interference.

When the interference amount is lower than the standard value, it must be replaced with a new one.

2.8 Water pump assembly

Assembly of Mitsubishi S6R diesel engine water pump

2.8.1 Installing the oil seal

(1) Use an installer to press the oil seal into the pump body so that the end faces of the oil seal and the press-in end of the pump body are flush.

(2) Apply grease to the lips of the oil seal.

2.8.2 Mitsubishi S6R diesel engine water pump bearing bush installation

Install the bearing bush on the pump shaft. During installation, the seal plate side of each bearing pad should face the oil seal side.

2.8.3 Installation of combined seal (fixed side)

(1) Apply sealant (ThreeBond 1102) to the outer periphery of the combined seal (fixed side).

(2) Use the combined seal installer to press the combined seal into the pump body.

2.8.4 Installation of Water Pump Shaft for Mitsubishi S6R Diesel Engine

(1) Carefully press the pump shaft into the pump body until the end face of the ball bearing pad contacts the pump body.

(2) Install the snap ring into the groove.

2.8.5 Installation of Water Seal for Mitsubishi S6R Diesel Engine

(1) Use an installer to press the oil seal into the pump body so that the end faces of the oil seal and the press-in end of the pump body are flush.

(2) Apply grease to the lips of the oil seal.

2.8.6 Combination seal (rotating side), impeller installation

(1) Install the combined seal (rotating side) into the impeller.

(2) Apply LLC to the combination seal (rotating side).

(3) Press in the pump impeller with a pressure device. When pressing in, the end face of the wheel hub of the impeller must be flush with the end face of the pump shaft.

1. Mitsubishi S6R diesel engine intake and exhaust system disassembly, inspection ......... 11-3

1.1 Disassembly and inspection of Mitsubishi S6R diesel engine air intake system .. 11-3

1.2 Disassembly and inspection of Mitsubishi S6R diesel engine exhaust system .. 11-8

2. Mitsubishi S6R Diesel Engine Intake and Exhaust System Disassembly, Maintenance, Assembly ... 11-11

2.1 Mitsubishi S6R diesel engine air cooler disassembly, maintenance, assembly ... 11-11

2.2 Mitsubishi S6R Diesel Engine Cleaning Air Filter. 11-16

3. Installation of Intake and Exhaust System. 11-17

3.1 Installation of Exhaust Pipe, Exhaust Manifold .. 11-17

3.2 Installing the air cooler 11-17

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